Check logs while debug mode enabled? It might provide some insight on
the issue thats causing the failure!
On 2025-02-05 16:20, Zieseniss Peter via dovecot wrote:
Hello All,
i hope everyone is well!
i have a rather irksome and pressing issue that i can't seem to
resolve..
This happens only on iOS devices..
Specifically, the problem is that the content of messages seems to
timeout when it loads either when you open a message, or when you hit
reply or forward, or whatever..
The email appears to load, but the content simply never shows up,
leaving only a wheel that says 'Loading'
Please see a screenshot of what it looks like:
https://zconsulting.net/_stuff/dovecot-ios-loading.jpg
This happens on all iOS devices (at least 18), many different versions
from the most current down to iOS 16..
This has been happening for at least 2 years, and it happens about
50-80% of the time when interacting with an older message (more than 6
months old)
Mail on macOS, Thunderbird on Windows, and RoundCube on the server all
work perfectly..
Note that most of these accounts have at between 12GB and 80GB (that's
the extreme case) of email..
The server is:
Dedicated 4-Core Xeon, 16GB RAM, 512GB NVMe SSD
AlmaLinux release 8.10 (Cerulean Leopard)
Dovecot 2.3.21.1
Exim 4.98
Here's what i've tried:
On the server, i installed FTS-Xapian
On the server, i set mail_max_userip_connections=512
On the clients, i disabled all email privacy settings and disabled
iCloud mail
The problem is that i really can't figure out what the issue is, but
this seems to be a very common issue between Dovecot and iOS, judging
by the amount of similar questions i see on g00gle, but no useful
answers (example here )..
It certainly seems like the iOS mail client is timing out when
receiving the body of these older messages, but i don't see anything
useful in the logs..
Please help!
Any suggestions are welcome!
My client is about to crucify me over this..
Thank You All in advance!
Sincerely,
Peter
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